21897487 is an odd 8-digits composite number following 21897486
and preceding 21897488 . In scientific notation, it is written as 2.1897487 × 10^7.
The sum of its digits is 46. It has a total of 3 prime factors and 8 positive divisors.
There are 21631680 positive integers (up to 21897487) that are relatively prime to 21897487.
21897487 has 8 divisors, whose sum is 22165200
The reverse of 21897487 is 78479812
Previous prime number is 523
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 46
Digital Root 1
Name
twenty-one million eight hundred ninety-seven thousand four hundred eighty-seven
Scientific notation
2.1897487 × 10^7
Engineering notation
2.1897487 × 10^6
Prime Factorization
149 × 523 × 281
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
21897487
Product of the distinct prime numbers
The prime factorization of 21897487 is 149 × 523 × 281.
Since it has a total of 3 prime factors.
8 , 3 , 33 , 59 , 427 , 682 , 7780 , 9409 , 80192 , 3584 , 463883 , 634949 , 3409805 , 4269049 , 85009547 , 75590739 , 54442722 , 575832485 , 2855964018 , 2132494795
n×2
43794974
n×3
65692461
n×4
87589948
n×5
109487435
n÷2
10948743.5
n÷3
7299162.3333333
n÷3
5474371.75
n÷5
4379497.4
n2
479499936915169
n3
1.0499843635101E+22
n4
2.2992018950165E+29
n5
5.0346743606499E+36
2 √n
4679.4750773992
3 √n
279.76803492318
4 √n
68.406688835224
5 √n
29.381830934125
8 divisors
τ
Total Divisors
8
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-21897486
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.125
Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G
Geometric Mean
1
Returns the nth root of the product of n divisors
H
Harmonic Mean
8
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 21897487 can be divided by 8 positive divisors.
The sum of these divisors (counting 21897487) is 1, the average is 0.125.
Base
System
Value
2
Binary
1010011100010000100001111
3
Ternary
1112012111201001
4
Quaternary
1103202010033
5
Quinary
21101204422
6
Senary
2101201131
8
Octal
123420417
10
Decimal
21897487
12
Duodecimal
74001a7
16
Hexadecimal
14e210f
20
Vigesimal
6gh3e7
36
Base36
d1c7j
md5
7a3b50285f847b7d9d81b3bb90afd30f
sha1
d8a560aab54649314c8213a654a1786a8bce0d76
sha256
c95cd685fbcfb088f6e998b3adeda80fba1f33398b6ff0a8097ead40514e89a0
sha512
72b570ff857f80b40fbfda6874de2ef5aa427868264c0adf1fa8f2b84d6bf76bb6a78ddbf2a59c5aee4df2f7cf17b5f2633bc9260874470b828399dba3de43ca
ripemd-160
53f9a154b05c5672ae398651b543be2d1c80224c
Diameter
43794974
Circumference
137585968.58256
Area
1.5063934792095E+15
Volume
4.3981642170499E+22
Surface area
6.0255739168379E+15
Circumference
137585968.58256
Perimeter
87589948
Area
479499936915169
Diagonal
30967723.097289
Surface area
2876999621491014
Volume
1.0499843635101E+22
Space diagonal
37927560.042079
Perimeter
65692461
Area
2.0762956324079E+14
Altitude
18963780.021039
Surface area
2.0762956324079E+14
Volume
1.2374184392964E+21
Height
10322574.365763